Structural instability of vortices in Bose-Einstein condensates -: art. no. 140403

被引：48

作者：

García-Ripoll, JJ

Molina-Terriza, G

Pérez-García, VM

Torner, L

机构：

[1] Univ Castilla La Mancha, ETSI Ind, Dept Matemat, E-13071 Ciudad Real, Spain

[2] Univ Politecn Cataluna, Dept Signal Theory & Commun, Lab Photon, ES-08034 Barcelona, Spain

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.87.140403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper we study a gaseous Bose-Einstein condensate and show the following: (i) A minimum value of the interaction is needed for the existence of stable persistent currents. (ii) Vorticity is not a fundamental invariant of the system, as there exists a conservative mechanism which can destroy a vortex and change its sign. (iii) This mechanism is suppressed by strong interactions.

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页码：140403/1 / 140403/4

页数：4

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